重型机械Issue(6)：42-47,6.
不同应变幅下高锰钢的低周疲劳性能研究
Study on low cycle fatigue properties of high manganese steel under different strain amplitudes
杨阳 1侯永超 2石鑫生 2陈永甲 2李晨 3朱梦琪3
作者信息
- 1. 金属成型技术与重型装备全国重点实验室, 陕西 西安 710018||中国重型机械研究院股份公司, 陕西 西安 710018||燕山大学 亚稳材料制备技术与科学国家重点实验室, 河北 秦皇岛 066004
- 2. 金属成型技术与重型装备全国重点实验室, 陕西 西安 710018||中国重型机械研究院股份公司, 陕西 西安 710018
- 3. 中国重型机械研究院股份公司, 陕西 西安 710018
- 折叠
摘要
Abstract
In this paper,the tensile and low cycle fatigue tests of high manganese steel casting(120Mn13)were carried out at room temperature.The dynamic strain aging in tensile deformation,cyclic stress-strain be-havior,cyclic hardening and softening behavior and crack propagation behavior under tension and compression fatigue deformation were studied.The results shown:low-frequency A-type peak sawtooth and shaped high-fre-quency B-type ripple sawtooth were found in the tensile curve,which represented dynamic strain aging.In the low cycle fatigue experiments under different strain amplitudes,the samples were first cycle hardened,and then cycle softened until fracture.With increasing strain amplitude,the maximum cyclic tensile stress increased gradually,but the fatigue life decreased.The cracks under high strain amplitude mostly propagated along the grain boundary,but the number of crack deflection and secondary cracks increased,which was the key reason for the little difference in fatigue life compared low strain amplitude.关键词
高锰钢/拉伸行为/低周疲劳/变形组织/裂纹扩展Key words
high manganese steel/tensile behavior/low cycle fatigue/deformed microstructure/crack propagation分类
矿业与冶金引用本文复制引用
杨阳,侯永超,石鑫生,陈永甲,李晨,朱梦琪..不同应变幅下高锰钢的低周疲劳性能研究[J].重型机械,2023,(6):42-47,6.
